Add kqueue bindings

src/unix/unikraft/mod.rs

@@ -489,8 +489,48 @@ s! {
     pub struct termios {}
 
     pub struct utsname {}
+
+    // kqueue
+    pub struct kevent {
+        pub ident: ::uintptr_t,
+        pub filter: ::c_short,
+        pub flags: ::c_ushort,
+        pub fflags: ::c_uint,
+        pub data: ::intptr_t,
+        pub udata: *mut ::c_void,
+        pub ext: [u64; 4],
+    }
 }
 
+// kqueue
+pub const EV_ADD: u16 = 0x1;
+pub const EV_DELETE: u16 = 0x2;
+pub const EV_ENABLE: u16 = 0x4;
+pub const EV_DISABLE: u16 = 0x8;
+pub const EV_ONESHOT: u16 = 0x10;
+pub const EV_CLEAR: u16 = 0x20;
+pub const EV_RECEIPT: u16 = 0x40;
+pub const EV_DISPATCH: u16 = 0x80;
+pub const EV_DROP: u16 = 0x1000;
+pub const EV_FLAG1: u16 = 0x2000;
+pub const EV_ERROR: u16 = 0x4000;
+pub const EV_EOF: u16 = 0x8000;
+pub const EV_SYSFLAGS: u16 = 0xf000;
+
+pub const EVFILT_READ: i16 = -1;
+pub const EVFILT_WRITE: i16 = -2;
+pub const EVFILT_AIO: i16 = -3;
+pub const EVFILT_VNODE: i16 = -4;
+pub const EVFILT_PROC: i16 = -5;
+pub const EVFILT_SIGNAL: i16 = -6;
+pub const EVFILT_TIMER: i16 = -7;
+pub const EVFILT_PROCDESC: i16 = -8;
+pub const EVFILT_FS: i16 = -9;
+pub const EVFILT_LIO: i16 = -10;
+pub const EVFILT_USER: i16 = -11;
+pub const EVFILT_SENDFILE: i16 = -12;
+pub const EVFILT_EMPTY: i16 = -13;
+
 // Unchecked
 pub const GRND_NONBLOCK: ::c_uint = 0x0001;
 pub const SYS_getrandom: ::c_long = 318;
@@ -1098,4 +1138,15 @@ extern "C" {
         attr: *mut pthread_condattr_t,
         clock_id: ::clockid_t,
     ) -> ::c_int;
+
+    // kqueue
+    pub fn kqueue() -> ::c_int;
+    pub fn kevent(
+        kq: ::c_int,
+        changelist: *const ::kevent,
+        nchanges: ::c_int,
+        eventlist: *mut ::kevent,
+        nevents: ::c_int,
+        timeout: *const ::timespec,
+    ) -> ::c_int;
 }